Well, June is a big month for Batman, the release of the graphic novel series Batman: Earth One vol 3, Catwoman soul stealer (graphic novel) (I am struggling to get through the book), and the release of part one of the long Halloween film.
However, this film, like the Live-Action Batman film, takes place in year two. However, a lot of cannon has changed between 1996 and 2021. a lot of changes have happened to the events of year two of batman’s operations. This is when the War of Jokes and Riddles happens, Batman and Catwoman sleep together for the first time, early on it is also before the war likely that the Designer appeared to teach the rouges…and the biggest change of all, Selian figured out Bruce Wayne was Batman in year one so she has always known Batman was Bruce Wayne in current cannon. These changes could drastically alter the Long Halloween.
One big change I noticed in the sneak peek special on Justice Society: World War II so far is the inclusion of Barbara Joan Gordan, aka the future batgirl, is in the film. Catwoman and batman meet where Falcone money is stored. It seems Batman chases Catwoman for the first time. They already have a bit of a relationship in the long Halloween book. They seem to be meeting for the first time in this.
I feel part two will be a lot different. We may get a war of jokes and riddles adaptation.